Excavator is a kind of construction machinery with high efficiency and the most widely used, and has become the one with the highest market share in the family of construction machinery products. According to statistics, more than 60% of the earthwork volume in engineering construction is completed by excavation machinery. Excavators are widely used in industry and agriculture.
Common excavators are driven by internal combustion engine and electric power. Among them, electric excavator is mainly used in plateau hypoxia and underground mine and some other flammable and explosive places. According to the different ways of walking, excavators can be divided into Crawler excavators and wheel excavators. According to different transmission modes, excavators can be divided into hydraulic excavators and mechanical excavators. Mechanical excavators are mainly used in some large mines. According to the use, excavators can be divided into general excavators, mining excavators, marine excavators, special excavators and other different categories.